Tracker using angle-converting cones
US5023440A · kind A · utility
16Cited by
9References
12Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Feb 23, 1990 |
| Grant date | Jun 11, 1991 |
| Priority date | — |
| Expiry date | Feb 23, 2010 |
Classification
- Technology area (CPC G)Physics
- CPC primaryG01S3/782
- WIPO fieldMeasurement
- WIPO sectorInstruments
Abstract
An optical tracker includes a plurality of detectors (20, 22), each of which is associated with an etendue-preserving concentrator (27, 28) that directs radiation to it. The concentrators (27, 28) associated with complementary detectors (20, 22) are oriented at angles with respect to each other such that their complementary angle-sensitive regions overlap. As a consequence, the outputs of the detectors can be used to aim the tracker even though the concentrators direct radiation to the detectors in a non-imaging manner.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.